1+1/sin(alpha) =4 the range is for alpha is from 0 to 360 find alpha???
I got the first angle as 19.5, however, the marking scheme stated that there is another angle(160.5) can you please explain how they got the second angle
I got the first angle as 19.5, however, the marking scheme stated that there is another angle(160.5) can you please explain how they got the second angle
1 Answer
Nov 17, 2017
See below.
Explanation:
We have:
#(sin alpha + 1)/sinalpha = 4#
#sinalpha + 1 = 4sinalpha #
#1 = 3sinalpha#
#sinalpha = 1/3#
#alpha = 19.5 and ?#
We know that sine is positive in the first and second quadrants, thus the reference angle for the second value of alpha is going to be
As required.
Hopefully this helps!